It sounds like you and the other person find yourselves in a unique and potentially challenging situation. Here are some steps you might consider taking:

1. Assess the Situation: Take a moment to calm down and assess your surroundings. You mentioned there's a small house with food and water, which is a positive sign.2. Introduce Yourselves: Even if you don't remember each other, it's important to establish some basic communication. Introduce yourselves by name and try to recall any recent memories you might have.3. Check for Injuries: Look for any signs of injury on yourself and the other person. If either of you is hurt, you'll need to address that first.4. Explore the Island: Carefully explore the island to get a better understanding of your environment. Look for any potential dangers, as well as any resources that might be useful.5. Ration Supplies: Since you mentioned there's food and water, it's important to ration these supplies. You don't know how long you might be on the island, so it's crucial to conserve resources.6. Establish a Shelter: If the house isn't suitable, consider establishing a shelter. This could be as simple as clearing a space under a tree or building a lean-to.7. Create a Plan: Discuss with the other person and create a plan. This could include establishing a routine, setting up a signal for help, or planning to explore the island further.8. Stay Calm and Rational: It's important to stay calm and rational. Panicking won't help the situation. Try to maintain a positive attitude and support each other.